A baker knows that the daily demand for strawberry pies is a random variable that follows the normal distribution with a mean of 31.85 and a standard deviation of 4.5 pies find the demand that has an 8% probability of being exceeded

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?